What is one reason why purchasing is so important?: O A a. Purchasing can spend a significant percentage of firm's total revenues. B. b. there are likely two supply organizations, a specialized group that handles raw materials, and one that acquires materials, supplies and services that support the operation of facilities. Occ. most purchases are for resale O Did purchases may represent a small percentage of total expenditures. O E. e non production purchasing is outsourced and expertise in production purchasing is developed in house